Current Usage 2006 (DR, HB, LX, WK, XK) - Systems (9 - Engine, 5.7L, 9 - Engine, 6.1L) 2007 (DR, HB, HG, LX, WK, XK) - Systems (9 - Engine, 5.7L, 9 - Engine, 6.1L) 2008 (DR, HB, HG, LC, LX, WK, XK) - Systems (9 - Engine, 5.7L, 9 - Engine, 6.1L) 2009 (DH, DS, HB, HG, LC, LX, WK, XK) - Systems (9 - Engine, 5.7L, 9 - Engine, 5.7L HEV, 9 - Engine, 6.1L) 2010 (DC, DS, LC, LX, WK, XK) - Systems (9 - Engine, 5.7L, 9 - Engine, 6.1L) 2011 (DS, LC, LD, LX, WD, WK) - Systems (9 - Engine, 5.7L, 9 - Engine, 6.4L) 2012 (DS, LC, LD, LX, WD, WK) - Systems (9 - Engine, 5.7L, 9 - Engine, 5.7L CNG, 9 - Engine, 6.4L) 2013 (D2, DD, DJ, DS, LC, LD, LX, WD, WK) - Systems (9 - Engine, 5.7L, 9 - Engine, 5.7L CNG, 9 - Engine, 6.4L) 2014 (D2, DD, DJ, DP, DS, LC, LD, LX, WD, WK) - Systems (9 - Engine, 5.7L, 9 - Engine, 5.7L CNG, 9 - Engine, 6.4L) 2015 (D2, DD, DJ, DP, DS, LA, LD, LX, WD) - Systems (9 - Engine, 6.4L, Engine, 5.7L, Engine, 5.7L CNG, Engine, 6.2L) 2016 (D2, DD, DJ, DP, DS, LA, LD, LX, WD) - Systems (9 - Engine, 5.7L, Engine, 6.4L, Engine, 5.7L CNG, Engine, 6.2L) 2017 (D2, DD, DJ, DP, DS, LA, LD, LX, WD, WK) - Systems (9 - Engine, 5.7L, Engine, 6.4L, Engine, 5.7L CNG, Engine, 6.2L) 2018 (D2, DD, DJ, DP, DS, LA, LD, LX, WK) - Systems (9 - Engine, 6.4L, Engine, 5.7L, Engine, 5.7L CNG, Engine, 6.2L) 2019 (D2, DD, DJ, DP, DS, DT, LA, LD, WD, WK) - Systems (9 - Engine, 6.4L, Engine, 5.7L, Engine, 6.2L)